137687099281 has 2 divisors, whose sum is σ = 137687099282. Its totient is φ = 137687099280.

The previous prime is 137687099239. The next prime is 137687099299. The reversal of 137687099281 is 182990786731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126348257025 + 11338842256 = 355455^2 + 106484^2 .

It is an emirp because it is prime and its reverse (182990786731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137687099281 - 2³¹ = 135539615633 is a prime.

It is a super-2 number, since 2×137687099281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (137688099281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68843549640 + 68843549641.

It is an arithmetic number, because the mean of its divisors is an integer number (68843549641).

Almost surely, 2^137687099281 is an apocalyptic number.

It is an amenable number.

137687099281 is a deficient number, since it is larger than the sum of its proper divisors (1).

137687099281 is an equidigital number, since it uses as much as digits as its factorization.

137687099281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9144576, while the sum is 61.

The spelling of 137687099281 in words is "one hundred thirty-seven billion, six hundred eighty-seven million, ninety-nine thousand, two hundred eighty-one".